George's curiosity about bones leads him to climb the dinosaur skeleton at the museum but he winds up falling off & breaking his leg. George has to wear a cast for a few weeks & stay at home. Hundley stays with him as his monkey sitter. George begins in a wheelchair & doesn't know how to use it, but Hundley teaches him how to navigate around the furniture in his apartment. Soon, George can walk on crutches & Hundley helps him out in the same way. Later, once George can walk on his cast, He goes to places like the park with Hundley.